The fatigue behaviour of metastable (AISI-304) austenitic stainless steel wires

✍ Scribed by M. Topic; R.B. Tait; C. Allen

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 402 KB
• Volume: 29
• Category: Article
• ISSN: 0142-1123
• DOI: 10.1016/j.ijfatigue.2006.07.007

✦ Synopsis

The fatigue behaviour of AISI 304 stainless steel has been investigated as a function of drawing strain. Both smooth and notched wire samples were subjected to three-point fatigue testing carried out under load control at room temperature.

This study has established that approximately 20% of prior deformation-induced martensite is a critical amount which determines the subsequent fatigue response of this steel. In steel with less than 20% of deformation-induced martensite, any martensite formed during the fatigue process will act beneficially by retarding fatigue cracking, raising the fatigue limit and resulting in a ductile fatigue fracture. However, in the presence of more than 20% of deformation-induced martensite, any martensite induced by cyclic strain will encourage more rapid crack initiation which leads to more brittle fracture surface characteristics. A scenario for predicting the fatigue behaviour of cold drawn AISI 304 stainless steel wire has been proposed in this study.